Disk bit and reamer



July 19, 1932. sfM. AKEYSON DISK BIT AND REAMER Filed April 28. 1930 \NVENTOR SWIM f1. fl/m'yso/v.

Patented July 19, 1932 inure stares swan maxnvson, or Lone BEACH, oamroruvrA DISK BIT Ann RE'AME J Application filed April 28,

This invention relates to a disk bit and reamer, particularly useful for the drilling of oil wells by the rotary process.

The prime object of my invention is to provide a novel means whereby the cutting disks are positively rotated, while the en-.

tire bit is being rotated by the drill pipe.

Another object is to provide a bit of the character stated in which the reaming cutters act to rotate the disksas well as to ream the hole. 7

Still another object is to provide a novel bit of the character stated which, will run smoother while operating in the hole, and

which will, therefore, cut faster and with less wear on the machinery than bits heretofore in use.

Other objects, advantages, and featuresof invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing Figure 1 is a side elevation of my dlsk b1t and reamer.

Figure 2 is a fragmentary view, partly in section and partly in elevation, of the lower part of the bit.

Figure 3 is a diagrammatic plan view of the cutters.

Figure 4 is a fragmentary view partly in section, of a slightly modified form of bit.

Referring more particularly to the drawing, the numeral 1 indicates a shank on the upper end of which a threaded coupling pin 2 is provided so that the bit may be coupled to the drill pipe. A pair of spaced legs and 4 depend from the shank 1 and the cutter members are journaled adjacent the lower end of the legs.

Disk cutters 5 and 6 are mounted on the inside of the legs 3, 4 respectively. Concentric with the disks 5 and 6, and positioned on the outside of the legs 3, 4 are two reaming cutters 7 and 8. These reaming cut- 3 ters are preferably of the frusto-conical type,

havin teeth on the outer surface thereof.

e ,i The disk and reaming cutter '5, and 6, 8 are secured together and rotate in unison as will be further described. V

The disks and reamers are'Journaled 1n the hole.

1930. Serial r w-.737. 1

splitsleeves 9 and 10,"said sleeves being secured in the legs 3, 4 respectively. The inn-er end of each of the reamers is threaded as at 11, and this threaded portion screws into the hub portion of a cutter disk. Bolts 12 and 13 are countersunk in the reamers countersunk flush with the inner surface of the disk and screw on to the bolt 12-,'13 respectively, thus securely coupling the disk and the .reamer together, and causes them to rotate in unison.

The legs 3, 4 are not in exact transverse alignment, but are set slightly ahead in the direction of rotation of the bit. Thus the leading portion only, of the reaming cutters :7, 8 will engage the side walls of the hole to rr. 0 m.

. 8, .7 respectively and extends through the reamer and disk cutter.- Nuts 14, 14 are the legs 3, 4. The hub portions of the disks 7 5, 6 are made slightly longer, or the inner end of the reaming cutters are slightly elongated, thus providing a shank as shown at 15, which permits the reaming. cutters to move outwardly to ream the hole when the disks. 5, '3 are on bottom and are digging. Having described my invention, I claim:

1. A disk bit and reamer comprising a shank, a pair of spacedlegs depending from I: V

the shank, ,a disk cutter journaled on the inside of each of the legs, a reaming cutter on the outside of the legssaid reaming cut--- ter being of lesser diameter than said disk, said reaming cutter being secured to the disk whereby the disk and reaming cutter will rotate together.

2. A disk bit and reamer comprising aj shank, a'pair of spaced legs depending from the shank, a disk cutter onthe inside of each of the'legs and journaled therein, a reaming cutter on the outside of each of the legs, said reaming cutter being of lesser diameter than said disk, said reaming cutter being in axial alignment with the disk and secured thereto whereby the disks and reaming cutters will rotate together.

3. A disk bit and reamer comprising a shank, a pair of spaced legs depending from the shank, a disk journaled on the inside of each of the legs, a reaming cutter on the outside or" each of the legs, said reaming cutter being of lesser diameter than said disk, the inner end of said reaming cutters being threaded to screw into the disks, and a bolt extending through the reaming cutter and through the disk.

4. A disk bit and reamer comprising a shank, a pair of spaced legs depending from the shank, a disk rotatably mounted on the inside of each of said legs, a frusto-conica-l reaming cutter on the outside of each of the legs, teeth on theouter surface of said cutters, means securing each of said reaming cutters to a disk whereby said disks and reaming cutters are rotatable in unison, and said outters being of lesser diameter than said disks. In testimony whereof, I aflix my signature.

SWAN M. AKEYSON 

